User:21.Andromedae/S Serpentis

S Serpentis is star located in the constellation Serpens. It is is a Mira variable, class of red giant stars that are large and luminous, and have long period and large amplitudes in the visual magnitude (up to 2.5m). S Serpentis has an apparent magnitude varying between 7.5 and 14m over a period of 370.4 day. The distance to the star is 800 pc, based on a parallax of $mas1.25$. It was discovered in 1828 by Karl Harding.

Characteristics
S Serpentis has a radius of. The angular diameter of the star is measured at $583$.